/*
* TCP protocol
- * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
*/
#include "avformat.h"
#include <unistd.h>
+#include "internal.h"
#include "network.h"
+#include "os_support.h"
+#if HAVE_POLL_H
+#include <poll.h>
+#endif
#include <sys/time.h>
-#include <fcntl.h>
typedef struct TCPContext {
int fd;
} TCPContext;
-/* resolve host with also IP address parsing */
-int resolve_host(struct in_addr *sin_addr, const char *hostname)
-{
- struct hostent *hp;
-
- if ((inet_aton(hostname, sin_addr)) == 0) {
- hp = gethostbyname(hostname);
- if (!hp)
- return -1;
- memcpy (sin_addr, hp->h_addr, sizeof(struct in_addr));
- }
- return 0;
-}
-
/* return non zero if error */
static int tcp_open(URLContext *h, const char *uri, int flags)
{
- struct sockaddr_in dest_addr;
- char hostname[1024], *q;
+ struct addrinfo hints, *ai, *cur_ai;
int port, fd = -1;
TCPContext *s = NULL;
- fd_set wfds;
- int fd_max, ret;
- struct timeval tv;
+ int ret;
socklen_t optlen;
- char proto[1024],path[1024],tmp[1024]; // PETR: protocol and path strings
-
- url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
- &port, path, sizeof(path), uri); // PETR: use url_split
- if (strcmp(proto,"tcp")) goto fail; // PETR: check protocol
- if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); } // PETR: take only the part after '@' for tcp protocol
-
- s = av_malloc(sizeof(TCPContext));
- if (!s)
- return AVERROR(ENOMEM);
- h->priv_data = s;
-
- if (port <= 0 || port >= 65536)
- goto fail;
+ char hostname[1024],proto[1024],path[1024];
+ char portstr[10];
+
+ av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
+ &port, path, sizeof(path), uri);
+ if (strcmp(proto,"tcp") || port <= 0 || port >= 65536)
+ return AVERROR(EINVAL);
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ snprintf(portstr, sizeof(portstr), "%d", port);
+ ret = getaddrinfo(hostname, portstr, &hints, &ai);
+ if (ret) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Failed to resolve hostname %s: %s\n",
+ hostname, gai_strerror(ret));
+ return AVERROR(EIO);
+ }
- dest_addr.sin_family = AF_INET;
- dest_addr.sin_port = htons(port);
- if (resolve_host(&dest_addr.sin_addr, hostname) < 0)
- goto fail;
+ cur_ai = ai;
- fd = socket(PF_INET, SOCK_STREAM, 0);
+ restart:
+ fd = socket(cur_ai->ai_family, cur_ai->ai_socktype, cur_ai->ai_protocol);
if (fd < 0)
goto fail;
- fcntl(fd, F_SETFL, O_NONBLOCK);
+ ff_socket_nonblock(fd, 1);
redo:
- ret = connect(fd, (struct sockaddr *)&dest_addr,
- sizeof(dest_addr));
+ ret = connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
if (ret < 0) {
- if (errno == EINTR)
+ struct pollfd p = {fd, POLLOUT, 0};
+ if (ff_neterrno() == AVERROR(EINTR)) {
+ if (url_interrupt_cb())
+ goto fail1;
goto redo;
- if (errno != EINPROGRESS)
+ }
+ if (ff_neterrno() != AVERROR(EINPROGRESS) &&
+ ff_neterrno() != AVERROR(EAGAIN))
goto fail;
/* wait until we are connected or until abort */
ret = AVERROR(EINTR);
goto fail1;
}
- fd_max = fd;
- FD_ZERO(&wfds);
- FD_SET(fd, &wfds);
- tv.tv_sec = 0;
- tv.tv_usec = 100 * 1000;
- ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
- if (ret > 0 && FD_ISSET(fd, &wfds))
+ ret = poll(&p, 1, 100);
+ if (ret > 0)
break;
}
/* test error */
optlen = sizeof(ret);
getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen);
- if (ret != 0)
+ if (ret != 0) {
+ av_log(NULL, AV_LOG_ERROR,
+ "TCP connection to %s:%d failed: %s\n",
+ hostname, port, strerror(ret));
goto fail;
+ }
}
+ s = av_malloc(sizeof(TCPContext));
+ if (!s) {
+ freeaddrinfo(ai);
+ return AVERROR(ENOMEM);
+ }
+ h->priv_data = s;
+ h->is_streamed = 1;
s->fd = fd;
+ freeaddrinfo(ai);
return 0;
fail:
- ret = AVERROR_IO;
+ if (cur_ai->ai_next) {
+ /* Retry with the next sockaddr */
+ cur_ai = cur_ai->ai_next;
+ if (fd >= 0)
+ closesocket(fd);
+ goto restart;
+ }
+ ret = AVERROR(EIO);
fail1:
if (fd >= 0)
closesocket(fd);
- av_free(s);
+ freeaddrinfo(ai);
return ret;
}
+static int tcp_wait_fd(int fd, int write)
+{
+ int ev = write ? POLLOUT : POLLIN;
+ struct pollfd p = { .fd = fd, .events = ev, .revents = 0 };
+ int ret;
+
+ ret = poll(&p, 1, 100);
+ return ret < 0 ? ff_neterrno() : p.revents & ev ? 0 : AVERROR(EAGAIN);
+}
+
static int tcp_read(URLContext *h, uint8_t *buf, int size)
{
TCPContext *s = h->priv_data;
- int len, fd_max, ret;
- fd_set rfds;
- struct timeval tv;
-
- for (;;) {
- if (url_interrupt_cb())
- return AVERROR(EINTR);
- fd_max = s->fd;
- FD_ZERO(&rfds);
- FD_SET(s->fd, &rfds);
- tv.tv_sec = 0;
- tv.tv_usec = 100 * 1000;
- ret = select(fd_max + 1, &rfds, NULL, NULL, &tv);
- if (ret > 0 && FD_ISSET(s->fd, &rfds)) {
- len = recv(s->fd, buf, size, 0);
- if (len < 0) {
- if (errno != EINTR && errno != EAGAIN)
- return AVERROR(errno);
- } else return len;
- } else if (ret < 0) {
- return -1;
- }
+ int ret;
+
+ if (!(h->flags & URL_FLAG_NONBLOCK)) {
+ ret = tcp_wait_fd(s->fd, 0);
+ if (ret < 0)
+ return ret;
}
+ ret = recv(s->fd, buf, size, 0);
+ return ret < 0 ? ff_neterrno() : ret;
}
-static int tcp_write(URLContext *h, uint8_t *buf, int size)
+static int tcp_write(URLContext *h, const uint8_t *buf, int size)
{
TCPContext *s = h->priv_data;
- int ret, size1, fd_max, len;
- fd_set wfds;
- struct timeval tv;
-
- size1 = size;
- while (size > 0) {
- if (url_interrupt_cb())
- return AVERROR(EINTR);
- fd_max = s->fd;
- FD_ZERO(&wfds);
- FD_SET(s->fd, &wfds);
- tv.tv_sec = 0;
- tv.tv_usec = 100 * 1000;
- ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
- if (ret > 0 && FD_ISSET(s->fd, &wfds)) {
- len = send(s->fd, buf, size, 0);
- if (len < 0) {
- if (errno != EINTR && errno != EAGAIN)
- return AVERROR(errno);
- continue;
- }
- size -= len;
- buf += len;
- } else if (ret < 0) {
- return -1;
- }
+ int ret;
+
+ if (!(h->flags & URL_FLAG_NONBLOCK)) {
+ ret = tcp_wait_fd(s->fd, 1);
+ if (ret < 0)
+ return ret;
}
- return size1 - size;
+ ret = send(s->fd, buf, size, 0);
+ return ret < 0 ? ff_neterrno() : ret;
}
static int tcp_close(URLContext *h)
return 0;
}
-URLProtocol tcp_protocol = {
+static int tcp_get_file_handle(URLContext *h)
+{
+ TCPContext *s = h->priv_data;
+ return s->fd;
+}
+
+URLProtocol ff_tcp_protocol = {
"tcp",
tcp_open,
tcp_read,
tcp_write,
NULL, /* seek */
tcp_close,
+ .url_get_file_handle = tcp_get_file_handle,
};
projects / ffmpeg / blobdiff